This copper sheet is 18 gauge/40 Mil (.040 inches) thick and eight inches wide by eight inches long. It is manufactured to ASTM-B152 specifications, is annealed (dead soft and very malleable) with a smooth commercial finish, and is 99.9% pure copper alloy 110. This sheet can be used for various craft and art projects, do it yourself and construction projects, electrical applications, manufacturing, and much more! These sheets are packaged to provide superior protection during transit to ensure delivery without damage. If you have any questions, please don't hesitate to contact us via phone at 252-491-2812, via email at email@example.com or through our "live chat" and we will be happy to discuss your project!